@Bhutan - I understand what you are saying but I am not sure that tenure for an academic position is the right way to go. I think that the fact that you can lose your job motivates you to perform at your best.
However, if that fear is removed it might make a teacher complacent and not perform his or her job with the same zeal. I also think that it does not gives the school system an opportunity to evaluate the performance of the teacher each and every year to ensure that they are performing at satisfactory levels.
I know that there is a debate right now about ending teacher tenure for that reason in the public school system in Florida. As a matter of fact, the legislature signed a bill that would end teacher tenure for new and incoming teachers.
The teachers that have already obtained tenure will remain tenured. I think that the problem is that many schools are failing or are below average with respect to national standards and they want to make everyone accountable.
I think that in failing schools we have to look at everything and possibly put the best teachers in those schools in order to turn them around. The teaching profession is not easy, but I don’t think that offering tenure is the answer.